In Stewie Scraps and the Trolley Cart, Alfie Battersby, just about the cleverest and richest boy in Mr Melling's class, invites Stewie to his karting-party.

Stewie is on Alfie's team at the karting track. He tries to remember everything he's been shown but it isn't as easy as he expects - and he isn't the only one having problems! It is all over far too quickly.

Back at the flat, Stewie heads for the shed as soon as he can. "Got to get it all down before I forget." But his new design doesn't go according to plan. Find out what goes wrong and how Grandpa comes to the rescue.